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[AMD] HD Radeon 7970 won't run at 120 hz.

Last response: in Graphics & Displays
December 1, 2012 10:00:05 AM

I have a Benq 120hz screen with a d-sub cable, I've tested the screen on another computer. The cable and monitor run perfectly at 120hz. However when I plug into my main computer, my HD radeon Directcu II 3 gig won't run it at 120hz. I've tried both inputs for my d-sub cable to no avail. The odd thing is when I plug it into my desktop, it displays the screen as running on dvi, not d-sub.

I've spent quite awhile for searching for answers, but no one has quite had my problem from what I've read.

I would really appreciate a different avenue of thought.

My motherboard is a p8z68-v GEN3, if that has anything to do with it.
December 2, 2012 4:43:22 AM

I forgot to mention, I've used the bios switch and also tried both ports interchangeably and my drivers are up to date.
a c 217 U Graphics card
December 2, 2012 4:57:20 AM

Do you have another connection option for DUAL LINK DVI-D? The D-Sub option is only supposed to support up to 85hz as far as I'm aware.